WO2013091450A1

WO2013091450A1 - Minimization of drive test method and network element

Info

Publication number: WO2013091450A1
Application number: PCT/CN2012/084355
Authority: WO
Inventors: 冯莉; 赵东
Original assignee: 华为技术有限公司
Priority date: 2011-12-19
Filing date: 2012-11-09
Publication date: 2013-06-27
Also published as: CN103167533A

Abstract

Disclosed are a minimization of drive test method and a network element, which relate to the field of communications and can improve the accuracy of drive tests. The drive test minimization method in the embodiments of the present invention comprises: receiving an MDT activation command sent by an OAM entity, the MDT activation command comprising the positioning accuracy required by the OAM entity; selecting a user terminal meeting requirements for the positioning accuracy as an MDT task terminal according to the positioning capacity information or the accuracy satisfaction of the user terminal; and sending MDT to the selected user terminal, so that the selected user terminal carries out MDT measurement.

Description

Minimizing the road test method and the network element. The application claims the priority of the Chinese patent application filed on December 19, 2011, the Chinese Patent Office, the application number is 201110427166.8, and the invention name is "minimized road test method and network element". The entire contents are incorporated herein by reference.

Technical field

The present invention relates to the field of communications, and in particular, to a minimization of a drive test method and a network element. Background technique

In the existing communication system, the user equipment (User Equipment, UE for short) is used to measure the data collected by Minimization of Drive-Tests (MDT) to cover and capacity the network system. Capacity; optimization, mobility optimization, common channel parameter optimization, and QoS (Quality of Service, QoS for short), etc., Quality of Service (QoS).

The MDTs specified in the 3rd Generation Partnership Project (3GPP) are divided into two categories: Management Based MDT and Signaling Based MDT. The management-based MDT is that the network element selects the UE as the MDT according to the UE capability and the user subscription information; the signaling-based MDT is the MDT specified by the Operations Administration and Maintenance (OAM) UE.

In the process of implementing the present invention, the inventors have found that at least the following problems exist in the prior art, and the MDT in the prior art only selects the UE according to the user capability and the user's will, so that the data measured by the selected UE cannot meet the requirements of the operator. Affected the accuracy of the road test. Summary of the invention

Aspects of the present invention provide a method of minimizing a drive test and a network element, which improves the accuracy of the drive test.

In an aspect of the present invention, a method for minimizing a drive test (MDT) is provided, comprising: receiving an MDT activation command sent by an operation, maintenance, and management (OAM) entity, where the MDT activation command includes a positioning accuracy required by an OAM entity ;

Selecting a user terminal that meets the positioning accuracy requirement as an MDT task terminal according to the positioning capability information or the accuracy satisfaction degree of the user terminal;

The MDT is sent to the selected user terminal to enable the selected user terminal to perform MDT measurement.

Another aspect of the present invention provides a network element, including:

a receiving unit, configured to receive an MDT activation command sent by an operation, maintenance, and management (OAM) entity, where the MDT activation command includes a positioning accuracy required by an OAM entity;

a selecting unit, configured to select a user terminal that meets the positioning accuracy requirement as an MDT task terminal according to the positioning capability information or the accuracy satisfaction degree of the user terminal;

And a sending unit, configured to send an MDT to the selected user terminal, so that the selected user terminal performs MDT measurement.

The minimization of the road test method described in the above various aspects can improve the accuracy of the road test. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art without departing from the drawings.

1 is a schematic flowchart of a method for minimizing a road test according to an embodiment of the present invention; 2 is a schematic diagram of a network element in an embodiment of the present invention;

FIG. 3 is a schematic diagram of a selection unit in an embodiment of the present invention. detailed description

In the following description, for purposes of illustration and description However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the invention.

The various techniques described herein can be used in a variety of wireless communication systems, such as current 2G, 3G communication systems and next generation communication systems, such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), Code Division Multiple Access system, Time Division Multiple Access (TDMA) system, Wideband Code Division Multiple Access (WCDMA), Frequency Division Multiple Access (FDMA), Frequency Division Multiple Addressing (FDMA) system, Orthogonal Frequency-Division Multiple Access (OFDMA) system, single carrier FDMA (SC-FDMA) system, General Packet Radio Service (GPRS) system, Long Term Evolution (LTE, Long Term Evolution) ) systems, and other such communication systems.

Various aspects are described herein in connection with a terminal and/or base station and/or base station controller.

The user equipment, which may be a wireless terminal or a wired terminal, may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal Computer, for example, can be portable, pocket-sized, handheld, built-in or on-board Mobile devices that exchange language and/or data with a wireless access network. For example, personal communication services

(PCS, Personal Communication Service) Telephone, cordless phone, Session Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), etc. A wireless terminal may also be called a system, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, an Access Point, Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment.

A base station (e.g., an access point) can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited.

The base station controller may be a base station controller (BSC) in GSM or CDMA, or may be a radio network controller (RNC) in WCDMA, which is not limited in the present invention.

Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or," in this context is merely an association describing the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, while A and B exist, alone There are three cases of B. In addition, the character "/,,, in this article, generally means that the contextual object is a kind of "or," relationship.

This embodiment provides a method for minimizing the drive test. It should be noted that the method in this embodiment is a method on the NE side, as shown in FIG. 1 . 101. Receive an MDT activation command sent by an OAM entity, where the MDT activation command includes a positioning accuracy required by an OAM entity.

The MDTs in 3GPP fall into two broad categories: Management Based MDT and Signaling Based MDT. According to the method of reporting MDT measurement data by the user terminal, the MDT measurement data can be further divided into MDT measurement data (Logging MDT) and real-time reporting MDT measurement data (immediate MDT). Among them, the following is a detailed introduction based on the management MDT.

The OAM entity sends an MDT activation command to the network element, where the MDT activation command includes the positioning accuracy required by the OAM entity, and is used to indicate the positioning accuracy required for the MDT measurement.

In addition, the MDT activation command may further include MDT priority information and the number of users, and the MDT priority information includes positioning accuracy priority or data volume priority. Positioning accuracy Priority means that the acquired data must first meet the specified positioning accuracy; the data quantity priority means that the acquired data must first satisfy the specified quantity. When the priority information of the MDT is the priority of the positioning accuracy, only the user terminal that meets the positioning accuracy requirement is selected to perform the MDT. When the MDT priority information is the data volume priority, the user terminal that meets the positioning accuracy requirement is preferentially selected to perform the MDT, and the user who meets the positioning accuracy is selected. When the number of terminals cannot reach the specified number of users, you can select a user terminal that does not meet the positioning accuracy requirements to do MDT.

Optionally, the MDT activation command further includes time period information. For example, when the MDT priority information is the priority of the positioning precision, only the user terminal that meets the positioning accuracy requirement is selected to perform the MDT within the specified time; after the time period, the selected one is selected. When the number of users cannot meet the requirements of the specified number of users, the user terminal that does not meet the positioning accuracy requirement may be selected to perform MDT.

Step 102: Select, according to the positioning capability information or the accuracy satisfaction degree of the user terminal, the user terminal that meets the positioning accuracy requirement as the MDT task terminal. In order to enable the network element to learn the information of the user terminal in its jurisdiction, one or more user terminals first report the location capability information to the network element. The positioning capability information includes positioning accuracy supported by the user terminal.

The positioning accuracy supported by the user equipment can be obtained by various methods. For example, for a user terminal positioning method in which the positioning method is GPS or GANSS, the positioning accuracy can be determined according to the number of satellites searched, that is, the number of satellites searched is more. For example, for a user terminal whose OTDOA positioning method is OTDOA, the user terminal can receive a Primary-Common Control Physical Channel (P-CCPCH) frame or a common pilot channel (Common Pilot). Channel, referred to as CPICH) The number of neighboring cells of the frame is used to determine the accuracy. The more the number of neighbor cells detected, the higher the positioning accuracy. For example, in the area where the micro base station is deployed, the detected micro cell can also be used. The positioning accuracy is determined. For example, the coverage of the micro cell is 5 meters. If the user terminal detects the micro cell, it indicates that the user terminal is within 5 meters of the micro cell, so that the location of the user terminal is determined according to the location of the micro cell.

The network element receives positioning capability information from the user terminal. The network element may be specifically: a core network element mobility management entity (MME) or a serving general packet radio service technology support node (Serving GPRS SUPPORT NODE, abbreviated as SGSN), or an access network element radio network controller (Radio Network) Controller (abbreviated as RNC) or evolved Node B (eNB) or Balanced Score Card (BSC).

In addition, the positioning capability information may further include: a positioning method supported by the user terminal. The positioning methods include the Global Position System (GPS) positioning method, the Galileo and Additional Navigation Satellite Systems (GANSS) positioning method, and the Observed Time Difference Of Arrival. OTDOA) positioning method and Assisted Global Positioning Systems (A-GPS) positioning method The method, but not limited to the above positioning method.

In addition, the positioning capability information includes: whether the GPS receiver or the GANSS receiver or the A-GPS receiver is turned on. The user terminal can only perform positioning when the GPS receiver or the GANS S receiver or the A-GPS receiver is turned on, that is, the network element can only select the user terminal opened by the receiver to perform MDT measurement and positioning.

Step 103: Send an MDT to the selected user terminal, so that the selected user terminal performs MDT measurement.

For example, for MDT (immediate MDT) measurement that requires real-time data, the network element notifies the user terminal to perform MDT measurement and positioning through a MEASUREMENT CONTROL message; for MDT (Logging MDT) measurement of non-real-time reporting data, wireless The network controller notifies the user terminal to perform MDT measurement and positioning through a LOGGING MEASUREMENT CONFIGURATION message. As an implementation method of the present invention, the positioning capability information reported by the user terminal includes positioning accuracy information, and the network element selects a user terminal that meets the positioning accuracy requirement according to the positioning capability information reported by the user terminal, and then sends an MDT configuration message to the user terminal. , notifying the user terminal to perform MDT measurement. Among them, the positioning accuracy can be expressed in various forms, such as 10 meters, 50 meters, 100 meters, 150 meters, etc.; positioning accuracy can also be divided into several levels, such as high, medium and low levels, MDT activation command If the positioning accuracy is a high level, the user terminal that reports the positioning accuracy to a high level is selected to perform the MDT; for example, the positioning accuracy can be represented by the horizontal accurate code and the vertical accurate code, wherein the horizontal accurate code is used to indicate the horizontal position accuracy, and can be used. An integer factor k means, for example, a horizontal accuracy of 10* ( l . l ^k -l ); a vertical exact code is used to indicate vertical position accuracy, which can be expressed by an integer factor k, such as a vertical accuracy of 45* ( 1.025 ^k -l ). For example, if the level of the positioning accuracy required by the OAM entity is "high," the network element selects the level of the positioning accuracy according to the positioning capability information reported by the user terminal to be "high", and the user terminal performs the MDT measurement.

Further, if the MDT activation command delivered by the OAM includes priority information, If the positioning accuracy is required to be prioritized, the MDT measurement data and the positioning result satisfying the positioning accuracy requirement may be reported to the OAM entity; if the data volume is prioritized, the MDT measurement data and the positioning result are reported regardless of whether the positioning accuracy requirement is met.

In addition, the network element may first select one or more positioning methods according to the positioning accuracy required by the OAM entity in the MDT activation command, so that the user terminal performs MDT measurement and positioning according to the selected positioning method, or selects the positioning method. The required user terminal. For example, if the positioning accuracy required by the OAM entity is "high", then the GPS positioning method with higher positioning accuracy is selected, and then the MDT configuration message is sent to the user terminal (ie, the user terminal with GPS function) that satisfies the positioning method requirement. The MDT configuration message contains the positioning accuracy required by the OAM entity. In addition, the selected positioning method can be sent to the user terminal together with the positioning accuracy required by the OAM entity, so that the user terminal that satisfies the positioning method performs the MDT measurement. Among them, the positioning method includes GPS or GNSS or A-GPS or OTDOA positioning method.

For example, you can choose A-GPS or GANSS positioning method or set A-GPS/GANSS is preferred but OTDOA is allowed (A-GPS priority OTDOA can be used as a supplement) or A-GPS+OTDOA. When the specified positioning method is GPS or GANSS, only the positioning method is allowed; when the specified positioning method is A-GPS/GANSS is preferred but OTDOA is allowed, the A-GPS or GANSS positioning method is preferred, when A- When the GPS and GANSS positioning methods are not available, the OADOA positioning method is selected. When the positioning method is set to A-GPS+OTDOA, the user terminal selects both positioning methods for measurement.

After the MDT measurement is performed by the user terminal to obtain the MDT measurement data and the positioning result, the user terminal obtains the satisfaction result of the positioning result according to the positioning accuracy required by the OAM entity, that is, the positioning accuracy satisfaction degree. For example, when the accuracy of the positioning result is greater than or equal to the positioning accuracy required by the OAM entity, the judgment result is satisfactory; otherwise, it is not satisfactory.

The user terminal will meet the positioning accuracy requirements of the MDT measurement data and the positioning result. The network element is reported to the network element; or the judgment result of the MDT measurement data and the positioning result and the satisfaction of the positioning result is reported to the network element.

The network element receives the MDT measurement data and the positioning result sent by the user terminal and the judgment result of whether the positioning result is satisfactory.

For the signaling-based MDT, the core network element sends a tracking activation message to the network element, where the tracking activation message is specifically a CN INVOKE TRACE message or a Serving General Packet Radio Service Support Node (SGSN) or a mobile service switching center. (Mobile Switching Center, referred to as MSC) or Mobility Management Entity (abbreviation). The core network element sends a tracking activation message to the network element to trigger the network element to notify the user terminal to perform the MDT measurement. The tracking activation message includes the positioning precision information, and the positioning accuracy information has multiple representations, for example, 10 meters, 50 degrees. For example, meters, 100 meters, etc., for example, the positioning accuracy can be divided into different levels, such as high, medium and low levels; for example, the horizontal accuracy code and the vertical accuracy code can be used to indicate the positioning accuracy, wherein the horizontal accuracy code is used. For the horizontal position accuracy, an integer factor k can be used, for example, the horizontal accuracy is 10* ( l . l ^k -l ); the vertical accurate code is used to indicate the vertical position accuracy, which can be represented by an integer factor k, such as The vertical accuracy is 45* (1.025 ^k -l ). The network element may be specifically: a core network element mobility management entity (MME) or a serving general packet radio service technology support node (Serving GPRS SUPPORT NODE, referred to as SGSN), or an access network element radio network controller (Radio Network Controller, Referred to as RNC) or evolved Node B (eNB) or Balanced Score Card (BSC).

The network element sends an MDT configuration message to the user terminal according to the tracking activation message, so that the user terminal performs the MDT measurement, and the MDT configuration message includes the positioning accuracy required by the core network element. As an implementation method of the present invention, the network element is first configured according to the core network element The required positioning accuracy is selected by one or more positioning methods, and the selected positioning method is sent to the user terminal together with the positioning accuracy required by the core network element, so that the user terminal performs MDT measurement and positioning according to the selected positioning method. . Among them, the positioning method includes GPS or GNSS or A-GPS or OTDOA positioning method. For example, you can choose A-GPS or GANSS positioning method or set A-GPS/GANSS is preferred but OTDOA is allowed (A-GPS priority OTDOA can be used as a supplement) or A-GPS+OTDOA. When the specified positioning method is GPS or GANSS, only the positioning method is allowed; when the specified positioning method is A-GPS/GANSS is preferred but OTDOA is allowed, the A-GPS or GANSS positioning method is preferred, when A- When neither GPS nor GANSS positioning methods are available, the OADOA positioning method is selected. When the positioning method is set to A-GPS+OTDOA, the user terminal selects both positioning methods for measurement.

Optionally, the MDT configuration message further includes positioning accuracy information, so that the user terminal determines the result according to the positioning accuracy information and whether the positioning result is satisfactory.

Optionally, the user terminal may only send the positioning result that meets the positioning accuracy requirement and the corresponding MDT measurement data to the network element; or the MDT measurement data, the positioning result, and the judgment result of whether the positioning result is satisfactory.

The network element receives the MDT measurement data from the user terminal, the positioning result, and the judgment result that the user terminal is satisfied with the positioning result according to the positioning accuracy required by the core network element, and then satisfies the MDT measurement data, the positioning result, and the positioning result. The judgment result is sent to the OAM entity.

After performing the MDT measurement, the user terminal reports the MDT measurement data, the positioning result, and the judgment result of whether the positioning result is satisfactory. Specifically, for the immediate MDT, the user terminal measures the data and the positioning result of the MDT by using the MEASUREMENT REPORT message, and for the Log MDT, the data of the MDT is measured by the UE INFORMATION RESPONSE message to the network element. And positioning knot fruit.

In the minimization of the drive test method of the embodiment, the user terminal reports the location capability information to the network element, so that the network element can select the match according to the MDT priority information and the location accuracy information sent by the OAM entity and the location capability information reported by the user terminal. The user terminal required by the MDT priority and the positioning accuracy performs the MDT measurement, thereby improving the accuracy of the location of the road test problem.

This embodiment provides a network element, as shown in FIG. 2, including a receiving unit 11, a selecting unit 12, and a sending unit 13.

The receiving unit 11 is configured to receive an MDT activation command sent by an operation, maintenance, and management (OAM) entity, where the MDT activation command includes a positioning accuracy required by the OAM entity;

The selecting unit 12 is configured to select, as the MDT task terminal, the user terminal that meets the positioning accuracy requirement according to the positioning capability information or the accuracy satisfaction degree of the user terminal;

The sending unit 13 is configured to send an MDT to the selected user terminal, so that the selected user terminal performs MDT measurement.

Further, as shown in FIG. 3, the selecting unit 12 specifically includes:

The sending sub-unit 121 is configured to send an MDT configuration command to the selected user terminal.

The receiving subunit 122 is configured to receive a positioning result from the user terminal, and the sending subunit 123 is configured to send the MDT measurement data and the positioning result to the OAM entity.

The receiving unit 11 is further configured to: receive positioning capability information reported by the user terminal. The working principle and working process of each component in this embodiment are similar to the method embodiment corresponding to FIG. 1, and details are not described herein again.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the division of each functional module described above is exemplified. In practical applications, it may be as needed. The function assignment is performed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the system, the device and the unit described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise. The components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile A medium that can store program code, such as a hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A method for minimizing a drive test (MDT), comprising: receiving an MDT activation command sent by an operation, maintenance, and management (OAM) entity, where the MDT activation command includes a positioning accuracy required by an OAM entity;

The MDT method according to claim 1, wherein the selecting the user terminal that meets the positioning accuracy requirement as the MDT task terminal further includes:

And sending an MDT configuration command to the selected user terminal;

Receiving a positioning result from the user terminal;

The MDT measurement data and the positioning result are sent to the OAM entity.

3. The MDT method according to claim 1, wherein before selecting the user terminal that satisfies the positioning accuracy requirement as the MDT task terminal, the method further includes:

Receiving the positioning capability information reported by the user terminal.

The MDT method according to claim 1 or 3, wherein the positioning capability information further includes: a positioning accuracy supported by the user terminal, or whether the positioning function is turned on,

The positioning functions include Global Positioning System (GPS) receivers or Galileo and other satellite navigation system (GANSS) receivers or network assisted Global Positioning System (A-GPS).

The MDT method according to claim 1, wherein the positioning capability information further includes: whether the network side network element can perform a network-based positioning method, and/or whether the terminal can perform a network-based positioning method.

The MDT method according to claim 1, wherein the entity that selects the user terminal according to the positioning capability is a network element, and the network element includes: Core Network Element Mobile Management Entity (MME) or Serving General Packet Radio Service Technology Support Node (SGSN), or Access Network Element Radio Network Controller (RNC) or Base Station Node (eNB) or Balanced Scorecard (BSC) .

The MDT method according to claim 6, wherein when the user terminal is selected according to the positioning capability, the core network element further includes the user positioning capability or the positioning accuracy, and the positioning accuracy of the terminal is obtained.

8. A network element, characterized in that:

The network element according to claim 8, wherein the selecting unit comprises:

a sending subunit, configured to send an MDT configuration command to the selected user terminal, a receiving subunit, configured to receive a positioning result from the user terminal, and a sending subunit, configured to send the MDT measurement data and the positioning result Give the OAM entity.

The network element according to claim 8, wherein the receiving unit is further configured to: receive positioning capability information reported by the user terminal.

The network element according to claim 8 or 10, wherein the positioning capability information further includes: a positioning accuracy supported by the user terminal, or whether the positioning function is turned on,

The positioning functions include Global Positioning System (GPS) receivers or Galileo and other satellite navigation system (GANSS) receivers or network-assisted global positioning systems (A-GPS).

The network element according to claim 8, wherein the positioning capability information further includes: whether the network side network element can perform a network-based positioning method, and/or whether the terminal can perform a network-based positioning method.